Vulnerability Description
Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | All versions |
| Fedoraproject | Fedora | 35 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2022/10/11/5Mailing ListPatchThird Party Advisory
- http://xenbits.xen.org/xsa/advisory-409.htmlPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202402-07
- https://www.debian.org/security/2022/dsa-5272Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-409.txtPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2022/10/11/5Mailing ListPatchThird Party Advisory
- http://xenbits.xen.org/xsa/advisory-409.htmlPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202402-07
- https://www.debian.org/security/2022/dsa-5272Third Party Advisory
FAQ
What is CVE-2022-33747?
CVE-2022-33747 is a vulnerability with a CVSS score of 3.8 (LOW). Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages...
How severe is CVE-2022-33747?
CVE-2022-33747 has been rated LOW with a CVSS base score of 3.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-33747?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen, Fedoraproject Fedora, Debian Debian Linux.